Removing roslyn from ASP.NET 4.5.2 project template

If you're using VS 2015 for development, ASP.NET projects now use Roslyn by default. The host I use as a test server doesn't support Roslyn / C# 6.0 yet. Though the website gets published successfully (using Web Deploy), I end up with an Internal Server Error.

According to this, roslyn support is added using a nuget package. So the first thing to do, is to remove the package. Open the Package Manager Console and type the following one line at a time: